Description
1. Overview of KNKE Customizable Large-Diameter Butterfly Valve
The KNKE customizable large-diameter butterfly valve is designed for pipe diameters greater than 300 mm. Featuring an eccentric structure, it offers both soft and hard sealing options. The valve body can be made from carbon steel, stainless steel, or other special alloys. Moreover, it is suitable for a variety of actuation types, including manual, worm gear, pneumatic, and electric.
This valve is commonly used in industries such as food processing, pharmaceuticals, chemicals, oil, power generation, textiles, and paper production. It plays a crucial role in regulating and controlling the flow of water, wastewater, gas, and other fluids, meeting the increasing demands of automation in industrial processes.
2. Key Specifications
- Nominal Diameter: DN50 – DN2000
- Nominal Pressure: 0.6 MPa – 2.5 MPa
- Flange Type: Wafer Type
- Seal Materials: Neoprene, Nitrile Rubber, EPDM, PTFE, Silicone, Viton, Natural Rubber, Nylon, and Metal Seals
- Temperature Range: -40°C to 120°C
- Function: On/Off, Flow Regulation
- Actuation Type: Pneumatic Cylinder (Single or Double Acting), Electric, Manual
- Connection Method: Wafer Type
- Test Pressure: 1.5x Rated Pressure Without Leakage
- Brand: KNKE (NICO)
3. Material Selection and Applicable Temperature for Seals
The KNKE butterfly valve offers a wide range of seal materials that cater to different operational requirements. Here’s a quick look at the material options and their respective temperature tolerances:
| Seal Material | Abbreviation | Max Temperature | Min Temperature | Working Temperature Range |
|---|---|---|---|---|
| Chloroprene Rubber | CR | 82°C | -40°C | 0°C to +80°C |
| Nitrile Rubber | NBR | 93°C | -40°C | -20°C to +82°C |
| EPDM Rubber | EPDM | 150°C | -40°C | -40°C to +125°C |
| PTFE | PTFE | 232°C | -268°C | -30°C to +150°C |
| Silicone Rubber | SI | 250°C | -70°C | -70°C to +150°C |
| Fluoroelastomer | Viton | 204°C | -23°C | -23°C to +150°C |
| Natural Rubber | NR | 85°C | -20°C | -20°C to +85°C |
4. Technical Parameters for the Butterfly Valve
| Nominal Diameter | PN (MPa) | Strength Test Pressure (MPa) | Seal Test Pressure (MPa) | Gas Seal Test Pressure (MPa) |
|---|---|---|---|---|
| DN50-DN2000 | 0.6 | 0.9 | 0.66 | 0.6 |
| 1.0 | 1.5 | 1.1 | 0.6 | |
| 1.6 | 2.4 | 1.76 | 0.6 |
5. Materials for Major Components
The materials for various parts of the KNKE butterfly valve include the following:
- Valve Body: Ductile Iron, Cast Steel, Alloy Steel, Stainless Steel
- Disc: Stainless Steel 2507, 1.4529, Ductile Iron with Rubber Lining, Special Alloys
- Seal Ring: Various types of rubber and PTFE
- Stem: 2Cr13, Stainless Steel
- Packing: O-Ring, Flexible Graphite O-Ring
6. Design and Standards
The KNKE customizable large-diameter butterfly valve meets the following design and manufacturing standards:
- Design and Manufacture: JB/T 8691-98
- Structure Length: GB/T 15188.2-94
- Flange Connection Dimensions: GB/T 9113-2000
- Valve Inspection and Testing: GB/T 13927-92
KNKE’s customizable large-diameter butterfly valves are designed for efficient fluid control in various industrial applications. With multiple actuation options, robust materials, and flexible sealing solutions, these valves offer optimal performance for water, gas, oil, and other media. Suitable for industries ranging from chemicals to power generation, KNKE butterfly valves ensure reliable operation and extended service life under demanding conditions.